Universal serial bus (USB) interface for mass storage device

  • US 7,231,485 B2
  • Filed: 11/16/2001
  • Issued: 06/12/2007
  • Est. Priority Date: 11/17/2000
  • Status: Active Grant
First Claim
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1. A method of communicating with a mass storage device comprising:

  • receiving ATA/ATAPI signals from a mass storage device into a bridging circuit;

    updating a state machine in response to embedded commands in the ATA/ATAPI signals;

    converting the ATA/ATAPI signals from the mass storage device into USB signals using the bridging circuit in response to the state machine; and

    outputting the USB signals from the bridging circuit;

    wherein the bridging circuit is provided in a single, bridging chip, the bridging chip including;

    a USB physical interface transceiver;

    a serial interface engine coupled to the USB physical interface transceiver;

    an input/output interface coupled to the serial interface engine;

    a ram control circuit coupled to the input/output interface;

    a global control circuit coupled to the input/output interface;

    a translate circuit coupled to the global control circuit; and

    a disk interface coupled to the ram control circuit and the translate circuit.

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